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    <meta charset="UTF-8">
    <title>Title</title>
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<table style="FonT-siZe: 10pt" border="1">
    <tbody>
    <tr>
        <td style="BACKGroUnD-CoLor: darkgreen; CoLor: white; FonT-WeiGHT: bold">
        </td>
        <td style="BACKGroUnD-CoLor: darkgreen; CoLor: white; FonT-WeiGHT: bold">
            <nobr>grep 2.5.1</nobr></td>
        <td style="BACKGroUnD-CoLor: darkgreen; CoLor: white; FonT-WeiGHT: bold">
            <nobr>egrep 2.5.1</nobr></td>
        <td style="BACKGroUnD-CoLor: darkgreen; CoLor: white; FonT-WeiGHT: bold">
            <nobr>sed 3.02<br>
                sed 4.07</nobr></td>
        <td style="BACKGroUnD-CoLor: darkgreen; CoLor: white; FonT-WeiGHT: bold">
            <nobr>awk 3.1.1</nobr></td>
        <td style="BACKGroUnD-CoLor: darkgreen; CoLor: white; FonT-WeiGHT: bold">
            <nobr>perl 5.8.0</nobr></td>
        <td style="BACKGroUnD-CoLor: darkgreen; CoLor: white; FonT-WeiGHT: bold">
            <nobr>vim 6.1</nobr></td>
        <td style="BACKGroUnD-CoLor: darkgreen; CoLor: white; FonT-WeiGHT: bold">
            <nobr>JavaScript ??</nobr></td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">转义</td>
        <td>\</td>
        <td>\</td>
        <td>\</td>
        <td>\</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\</td>
        <td>\</td>
        <td>\</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">行头</td>
        <td>^</td>
        <td>^</td>
        <td>^</td>
        <td>^</td>
        <td style="BACKGroUnD-CoLor: lightyellow">^</td>
        <td>^</td>
        <td>^</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">行尾</td>
        <td>$</td>
        <td>$</td>
        <td>$</td>
        <td>$</td>
        <td style="BACKGroUnD-CoLor: lightyellow">$</td>
        <td>$</td>
        <td>$</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">n个 {n}
            {m,n} {m,} {,n}</td>
        <td style="BACKGroUnD-CoLor: pink">\{n\}</td>
        <td>{n}</td>
        <td style="BACKGroUnD-CoLor: pink">\{n\}</td>
        <td style="BACKGroUnD-CoLor: pink">{n}或\{n\} 仅定义 --posix 或
            --re-interval有效(要表达}和{,得用\\{和\\}
            没有定义--posix或--re-interval时,不能用{n}的语法, \}\{和}{同义</td>
        <td style="BACKGroUnD-CoLor: lightyellow">{n}</td>
        <td style="BACKGroUnD-CoLor: pink">\{n\}</td>
        <td>{n}</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            {0,}</td>
        <td>*</td>
        <td>*</td>
        <td>*</td>
        <td style="BACKGroUnD-CoLor: pink">*或\*, (要表达*,得用\\*)</td>
        <td style="BACKGroUnD-CoLor: lightyellow">*</td>
        <td>*</td>
        <td>*</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            {1,}</td>
        <td style="BACKGroUnD-CoLor: pink">\+</td>
        <td>+</td>
        <td style="BACKGroUnD-CoLor: pink">\+</td>
        <td style="BACKGroUnD-CoLor: pink">+或\+, (要表达+, 得用\\+)</td>
        <td style="BACKGroUnD-CoLor: lightyellow">+</td>
        <td style="BACKGroUnD-CoLor: pink">\+</td>
        <td>+</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            {0,1}</td>
        <td style="BACKGroUnD-CoLor: pink">\?</td>
        <td>?</td>
        <td style="BACKGroUnD-CoLor: pink">\?</td>
        <td style="BACKGroUnD-CoLor: pink">?或\?, (要表达?, 得用\\?)</td>
        <td style="BACKGroUnD-CoLor: lightyellow">?</td>
        <td style="BACKGroUnD-CoLor: pink">\?</td>
        <td>?</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            任意字符</td>
        <td style="BACKGroUnD-CoLor: pink">.</td>
        <td style="BACKGroUnD-CoLor: pink">.</td>
        <td style="BACKGroUnD-CoLor: pink">.</td>
        <td style="BACKGroUnD-CoLor: pink">. 含\n.</td>
        <td style="BACKGroUnD-CoLor: lightyellow">. /s修饰后则含\n</td>
        <td style="BACKGroUnD-CoLor: pink">. 除\n</td>
        <td style="BACKGroUnD-CoLor: pink">. 除\n</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">(pat)
            匹配并获结果</td>
        <td style="BACKGroUnD-CoLor: pink">\(pat\)</td>
        <td>(pat)</td>
        <td style="BACKGroUnD-CoLor: pink">\(pat\)</td>
        <td style="BACKGroUnD-CoLor: pink">(pat)或\(pat\) (要表达括号,用\\( \\)
            )</td>
        <td style="BACKGroUnD-CoLor: lightyellow">(pat)</td>
        <td style="BACKGroUnD-CoLor: pink">\(pat\)</td>
        <td>(pat)</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">(?:pat)
            匹配但不获结果</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: lightyellow">(?:pat)</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td>(?:pat)</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">(?=pat)
            等于预查</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: lightyellow">(?=pat)</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td>(?=pat)</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">(?!pat)
            不等预查</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: lightyellow">(?!pat)</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td>(?!pat)</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">| 或</td>
        <td style="BACKGroUnD-CoLor: pink">\|</td>
        <td>|</td>
        <td style="BACKGroUnD-CoLor: pink">\|</td>
        <td style="BACKGroUnD-CoLor: pink">|或\| (要表达|,得用\\|)</td>
        <td style="BACKGroUnD-CoLor: lightyellow">|</td>
        <td style="BACKGroUnD-CoLor: pink">\|</td>
        <td>|</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            其中任意字符</td>
        <td>[xyz]</td>
        <td>[xyz]</td>
        <td>[xyz]</td>
        <td>[xyz]</td>
        <td style="BACKGroUnD-CoLor: lightyellow">[xyz]</td>
        <td>[xyz]</td>
        <td>[xyz]</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">[.ch.]
            [=ch=]</td>
        <td>不支持</td>
        <td>不支持</td>
        <td style="BACKGroUnD-CoLor: pink">[.ch.]</td>
        <td>不支持</td>
        <td style="BACKGroUnD-CoLor: lightyellow">不支持</td>
        <td>不支持</td>
        <td>不支持</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">单词边界
            \b</td>
        <td>\b</td>
        <td>\b</td>
        <td>\b</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\b</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td>\b</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">非单词边界
            \B</td>
        <td>\B</td>
        <td>\B</td>
        <td>\B</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\B</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td>\B</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">单词左右边界
            &lt;&gt;</td>
        <td style="BACKGroUnD-CoLor: pink">\&lt;
            \&gt;</td>
        <td style="BACKGroUnD-CoLor: pink">\&lt;
            \&gt;</td>
        <td style="BACKGroUnD-CoLor: pink">\&lt;
            \&gt;</td>
        <td style="BACKGroUnD-CoLor: pink">不支持
            (&gt;&lt;和\&gt;\&lt;和\\&gt;\\&lt;同义</td>
        <td style="BACKGroUnD-CoLor: lightyellow">
            不支持(&gt;&lt;和\&gt;\&lt;同义</td>
        <td style="BACKGroUnD-CoLor: pink">\&lt;
            \&gt;</td>
        <td>
            不支持(&gt;&lt;和\&gt;\&lt;同义</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">控制字符
            /cx</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td>\cx</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\cx</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td>\cx</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            数字\d</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\d</td>
        <td>\d</td>
        <td>\d</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            非数字\D</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\D</td>
        <td>\D</td>
        <td>\D</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">换页
            \f</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">高版本支持</td>
        <td>\f</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\f</td>
        <td style="BACKGroUnD-CoLor: pink">另义 \f表示文件名字符</td>
        <td>\f</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">换行
            \n</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td>\n</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\n</td>
        <td>\n</td>
        <td>\n</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">回车
            \r</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td>\r</td>
        <td>\r</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\r</td>
        <td>\r</td>
        <td>\r</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">空白
            \s</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\s</td>
        <td>\s</td>
        <td>\s</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">非空白
            \S</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\S</td>
        <td>\S</td>
        <td>\S</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">制表符
            \t</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">高版本支持</td>
        <td>\t</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\t</td>
        <td>\t</td>
        <td>\t</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">垂直制表符
            \v</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">高版本支持</td>
        <td>\v</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\v</td>
        <td style="BACKGroUnD-CoLor: pink">另义 \v表示very magic</td>
        <td>\v</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">单词字符 \w
            [A-Za-z0-9_]</td>
        <td>\w</td>
        <td>\w</td>
        <td>\w</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\w</td>
        <td>\w</td>
        <td>\w</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">非单词字符 \W
            [^A-Za-z0-9]</td>
        <td>\W</td>
        <td>\W</td>
        <td>\W</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\W</td>
        <td>\W</td>
        <td>\W</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">\xn
            16进制</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">高版本支持</td>
        <td>\xn</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\xn</td>
        <td style="BACKGroUnD-CoLor: pink">另义 \x表示[0-9A-Za-z]</td>
        <td>\xn</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">\n
            八进制</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td>\n</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\n</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
        <td>\n</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">\n
            后向引用</td>
        <td>\n</td>
        <td>\n</td>
        <td>\n</td>
        <td style="BACKGroUnD-CoLor: pink">\n 仅取结果可用</td>
        <td style="BACKGroUnD-CoLor: lightyellow">\n</td>
        <td style="BACKGroUnD-CoLor: pink">\n 仅取结果可用</td>
        <td>\n</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            [:alnum:] 字母和数字</td>
        <td>[:alnum:]</td>
        <td>[:alnum:]</td>
        <td>[:alnum:]</td>
        <td>[:alnum:]</td>
        <td style="BACKGroUnD-CoLor: lightyellow">[:alnum:]</td>
        <td>[:alnum:]</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            [:alpha:] 字母</td>
        <td>[:alpha:]</td>
        <td>[:alpha:]</td>
        <td>[:alpha:]</td>
        <td>[:alpha:]</td>
        <td style="BACKGroUnD-CoLor: lightyellow">[:alpha:]</td>
        <td>[:alpha:]</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            [:cntrl:] 控制字符</td>
        <td>[:cntrl:]</td>
        <td>[:cntrl:]</td>
        <td>[:cntrl:]</td>
        <td>[:cntrl:]</td>
        <td style="BACKGroUnD-CoLor: lightyellow">[:cntrl:]</td>
        <td>[:cntrl:]</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            [:digit:] 数字</td>
        <td>[:digit:]</td>
        <td>[:digit:]</td>
        <td>[:digit:]</td>
        <td>[:digit:]</td>
        <td style="BACKGroUnD-CoLor: lightyellow">[:digit:]</td>
        <td>[:digit:]</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            [:graph:] 可打印字符（不含空格）</td>
        <td>[:graph:]</td>
        <td>[:graph:]</td>
        <td>[:graph:]</td>
        <td>[:graph:]</td>
        <td style="BACKGroUnD-CoLor: lightyellow">[:graph:]</td>
        <td>[:graph:]</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            [:lower:] 小写</td>
        <td>[:lower:]</td>
        <td>[:lower:]</td>
        <td>[:lower:]</td>
        <td>[:lower:]</td>
        <td style="BACKGroUnD-CoLor: lightyellow">[:lower:]</td>
        <td>[:lower:]</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            [:print:] 可打印字符（含空格）</td>
        <td>[:print:]</td>
        <td>[:print:]</td>
        <td>[:print:]</td>
        <td>[:print:]</td>
        <td style="BACKGroUnD-CoLor: lightyellow">[:print:]</td>
        <td>[:print:]</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            [:punct:] 标点</td>
        <td>[:punct:]</td>
        <td>[:punct:]</td>
        <td>[:punct:]</td>
        <td>[:punct:]</td>
        <td style="BACKGroUnD-CoLor: lightyellow">[:punct:]</td>
        <td>[:punct:]</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            [:space:] 空格</td>
        <td>[:space:]</td>
        <td>[:space:]</td>
        <td>[:space:]</td>
        <td>[:space:]</td>
        <td style="BACKGroUnD-CoLor: lightyellow">[:space:]</td>
        <td>[:space:]</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            [:upper:] 大写字母</td>
        <td>[:upper:]</td>
        <td>[:upper:]</td>
        <td>[:upper:]</td>
        <td>[:upper:]</td>
        <td style="BACKGroUnD-CoLor: lightyellow">[:upper:]</td>
        <td>[:upper:]</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            [:xdigit:] 16进制数字</td>
        <td>[:xdigit:]</td>
        <td>[:xdigit:]</td>
        <td>[:xdigit:]</td>
        <td>[:xdigit:]</td>
        <td style="BACKGroUnD-CoLor: lightyellow">[:xdigit:]</td>
        <td>[:xdigit:]</td>
        <td style="BACKGroUnD-CoLor: pink">不支持</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            [:return:]</td>
        <td>不支持</td>
        <td>不支持</td>
        <td>不支持</td>
        <td>不支持</td>
        <td style="BACKGroUnD-CoLor: lightyellow">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">[:return:]</td>
        <td>不支持</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            [:tab:]</td>
        <td>不支持</td>
        <td>不支持</td>
        <td>不支持</td>
        <td>不支持</td>
        <td style="BACKGroUnD-CoLor: lightyellow">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">[:tab:]</td>
        <td>不支持</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            [:escape:]</td>
        <td>不支持</td>
        <td>不支持</td>
        <td>不支持</td>
        <td>不支持</td>
        <td style="BACKGroUnD-CoLor: lightyellow">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">[:escape:]</td>
        <td>不支持</td>
    </tr>
    <tr>
        <td style="BACKGroUnD-CoLor: green; CoLor: white; FonT-WeiGHT: bold">
            [:backspace:]</td>
        <td>不支持</td>
        <td>不支持</td>
        <td>不支持</td>
        <td>不支持</td>
        <td style="BACKGroUnD-CoLor: lightyellow">不支持</td>
        <td style="BACKGroUnD-CoLor: pink">[:backspace:]</td>
        <td>不支持</td>
    </tr>
    </tbody>
</table>
</body>
</html>